forked from OSchip/llvm-project
76 lines
2.7 KiB
C
76 lines
2.7 KiB
C
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//===------------------------------- unwind.h -----------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//
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// C++ ABI Level 1 ABI documented at:
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// https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html
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//
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//===----------------------------------------------------------------------===//
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#ifndef __ITANIUM_UNWIND_H__
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#define __ITANIUM_UNWIND_H__
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struct _Unwind_Context; // opaque
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struct _Unwind_Exception; // forward declaration
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typedef struct _Unwind_Exception _Unwind_Exception;
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struct _Unwind_Exception {
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uint64_t exception_class;
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void (*exception_cleanup)(_Unwind_Reason_Code reason,
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_Unwind_Exception *exc);
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#if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__)
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uintptr_t private_[6];
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#else
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uintptr_t private_1; // non-zero means forced unwind
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uintptr_t private_2; // holds sp that phase1 found for phase2 to use
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#endif
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#if __SIZEOF_POINTER__ == 4
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// The implementation of _Unwind_Exception uses an attribute mode on the
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// above fields which has the side effect of causing this whole struct to
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// round up to 32 bytes in size (48 with SEH). To be more explicit, we add
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// pad fields added for binary compatibility.
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uint32_t reserved[3];
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#endif
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// The Itanium ABI requires that _Unwind_Exception objects are "double-word
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// aligned". GCC has interpreted this to mean "use the maximum useful
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// alignment for the target"; so do we.
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} __attribute__((__aligned__));
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typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)(
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int version, _Unwind_Action actions, uint64_t exceptionClass,
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_Unwind_Exception *exceptionObject, struct _Unwind_Context *context);
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#ifdef __cplusplus
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extern "C" {
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#endif
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//
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// The following are the base functions documented by the C++ ABI
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//
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#ifdef __USING_SJLJ_EXCEPTIONS__
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extern _Unwind_Reason_Code
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_Unwind_SjLj_RaiseException(_Unwind_Exception *exception_object);
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extern void _Unwind_SjLj_Resume(_Unwind_Exception *exception_object);
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#else
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extern _Unwind_Reason_Code
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_Unwind_RaiseException(_Unwind_Exception *exception_object);
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extern void _Unwind_Resume(_Unwind_Exception *exception_object);
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#endif
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extern void _Unwind_DeleteException(_Unwind_Exception *exception_object);
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extern uintptr_t _Unwind_GetGR(struct _Unwind_Context *context, int index);
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extern void _Unwind_SetGR(struct _Unwind_Context *context, int index,
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uintptr_t new_value);
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extern uintptr_t _Unwind_GetIP(struct _Unwind_Context *context);
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extern void _Unwind_SetIP(struct _Unwind_Context *, uintptr_t new_value);
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#ifdef __cplusplus
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}
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#endif
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#endif // __ITANIUM_UNWIND_H__
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